线路零序电抗计算总结表.docx
2页
一张表带你学懂线路电气参数计算-线路零序阻抗计算（发输电专业）零序阻抗计算公式公式编号单 回 路无地线零序阻抗Z0=R+0.15+j0.435lgD3Redm3, Ω/km；线P17(2-1-11)地中电流等价深度：D=660ρ/f，Re：相导线半径,分裂导线为等价半径,m单地线零序阻抗Z01=Z0-Z0ag2/Z0g；线P17(2-1-12)地线零序阻抗Z0g=3Rg+0.15+j0.435lgDreg；线P17(2-1-13)导线与地线零序互感阻抗Z0ag=0.15+j0.435lgDdagdbgdcg；线P17(2-1-14)Rg:地线电阻Ω/km；reg: 地线的等价半径（m）；dag、dbg、dcg: 导线至地线的距离（m）双地线零序阻抗Z0z=Z0-Z0αgh2/Z0gh；线P17(2-1-15)双地线系统的零序阻抗Z0gh=1.5Rg+0.15+j0.435lgDregdgh(2-1-16)双地线与三相导线之间的零序互感抗Z0αgh=0.15+j0.435lgD6dagdbgdcgdahdbhdch(2-1-17)dgh: 双地线间的距离，m；dah、dbh、dch: 导线至地线的距离（m）双回路无地线每一回路零序阻抗Z0'=Z0+Z0I II；线P17(2-1-18)双回路零序阻抗Z0'=0.5Z0+Z0I II；(双回路导线型号相同时)(2-1-19)第Ⅱ回路对第Ⅰ回路的零序互感抗Z0I II=0.15+j0.435lgDdmI II；线P17(2-1-20)第Ⅰ回路导线与第Ⅱ回路导线的几何均距dmI II=daa'dab'dac'dba'dbb'dca'dcb'dcc'19(2-1-21)单回路零序阻抗Z0=R+0.15+j0.435lgD3Redm3；线P17(2-1-11)单地线零序阻抗Z0（1）'=Z0'-Z0ag'2/Z0g；线P20(2-1-22)导线与地线零序互感阻抗Z0ag'=0.15+j)t XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX0.435lgD6dagdbgdcgda'gdb'gdc'g(2-1-23)地线零序阻抗Z0g=3Rg+0.15+j0.435lgDreg；线P17(2-1-13)双地线零序阻抗Z02'=Z01-Z0agh'2/Z0gh，线P20(2-1-24)双地线与导线零序互感阻抗Z0agh'=0.15+h)XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXj0.435lgD6dagdbgdcgdahdbhdch(2-1-25)双地线系统的零序阻抗Z0gh=1.5Rg+0.15+j0.435lgDregdgh；线P20(2-1-16)。
